Wait so are you saying they are not separate entities?
Ummmmm .... 'terms'

. Not sure about the title 'entity' with them either . Nor even the terms Guardian spirit , guardian angel, etc .
'Separate' ? Perhaps, in as much as normal senses and receptions go . Holistically ? We could be part of a 'great chain of being ' with present focus on the here and now material body . If you are unfamiliar with these ideas look up 'Tutelary Deity ' ... even the Wiki page on it is a start ... go to the bottom of the page and there are lists of similar concepts from different cultures .
In indigenous culture here , with some, it is a given , not only guardian spirits and helpers but animal totems .... the 'person' and aspects of their psyche that come together to make them whole extends into the animal kingdom , eg. my teacher is a possum - literally , it isn't
just that 'his totem' is a possum , he
is one as well . ( This idea has been acknowledged and explored in anthropology with the amusing title of ; 'The real, the really real and the
really really real' . )
It also extends to 'country' ; your 'area' is an intimate part of yourself ; you exist
in it and
are it *. To the extent that a couple of years ago an Aboriginal woman won the Archibald prize here ( an award for portrait painting ) , there were protests ; its a landscape ! You cant enter a landscape painting in a portrait competition .' Regardless, 'the system' now acknowledges - ' that IS her , its an intimate part of her without which she would not exist ' and so the prize was upheld for her .
[ * I recently posted a film here '10 Canoes' as an example of the dynamics and teachings in myth , the beginning talks about coming out the waterhole , being born, dying, going back into the water hole, being born again ; a person is an extension and product of their country . ]
There is a possibility that different aspects of these ' parts of the psyche' might be modified , or expressed in modes particular to an individual depending on natal astrology ( just an idea I had ) .
They are an extension that functions independently similar to our immune system except it’s non local?
...
The 'function ' might be atrophied by some due to misuse and modern unnatural lifestyle , so maybe its like the appendix ?
There seems certain physical proofs and evidence that there is some type of function in the psyche like it , that will surface in even the non mystical types (in times of stress and danger ) - the 'Third Man Factor ' - very interesting that one !
- its not the only 'entity' that we hold within as as well , for example there is the 'Neuro-genetic Consciousness ' - a consciousness ( and memory ) held within the cells - it is often activated during 'ancestor contact ' . And with some , their 'self' extends through these ancestors , them being just one current manifestation .